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ASTM H12 Details

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H12 Application:Hot-Work Tool Steel

Category Type Grade Designations
Grades Tool Die Steels H12 USA - ASTM ,

Chemical composition(wt.%) of H12 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.30 0.40
Si 0.80 1.20
Mn 0.20 0.50
P - 0.030
S - 0.030
Cr 4.75 5.50
Mo 1.25 1.75
V 0.20 0.50
W 1.00 1.70
Ni+Cu - 0.75
Hot-Work Tool Steel

Mechanical properties of grade H12

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
588 (≥) 974 (≥) 11 12 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 334

Physical properties of grade H12

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
578 (≥) 859 (≥) 34 34 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 423
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
671 561 365

H12 - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
15X18H12C4TЮ GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
03X18H12 GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
03X18H12T GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
12X18H12T GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
08X18H12Б GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
05X21H12Γ2БPЩ GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
08X18H12T GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
08X19H12TΦ GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
08X20H12AБΦ GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
20X12H12Γ6 GOST Russia
Russia GOCT standard stainless steel and heat resistant steel steel grade and chemical composition
ISO H12 ISO International
Stainless steels - Chemical composition
H12 ASTM USA
Hot-Work Tool Steel
H12 SAE USA
Hot-Work Tool Steel

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